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US 11,992,101 B2Granted
Nucleated polypropylene resin for primary lens package
AssigneeJohnson & Johnson Vision Care, Inc.
InventorsOleg Grischenko, Billy Boddiford
Life of this patent
Estimating the term…
Abstract
A primary package for holding contact lenses is disclosed. It is primarily made from a nucleated polypropylene resin. It has been determined that the nucleated polypropylene resin should be formulated with a polypropylene base resin with greater than 99% polypropylene homopolymer and a primary and secondary stabilizer, which also contains a catalyst acid scavenger; at least one nucleator/clarifier; and at least one catalyst acid scavenger.
Claims8
In combination:
- a contact lens package comprising:
- a nucleated polypropylene resin formed from a polypropylene base resin consisting of a polypropylene homopolymer, a primary stabilizer comprising tris(3,5-di-butyl-4-hydroxylbenzyl) isocyanurate, and a secondary stabilizer comprising tris-(2,4-di-t-butylphenyl) phosphite;
- at least one nucleator comprising 1,2-cyclohexane dicarboxylic acid, calcium salt (1:1), (1R, 2S)-rel-;
- and
- at least one catalyst acid scavenger;
- wherein said nucleated polypropylene resin formed from a polypropylene base resin at greater than 99 weight %;
- said at least one nucleator at less than 0.25 weight %;
- and
- said at least one catalyst acid scavenger at less than 0.1 weight %, and
- a contact lens contained in said package.
7 more elements
Dependencies are inferred from the claim text.